Ni(OH)_2水热氢还原制备超细Ni粉

材料研究学报, 1995, 9(3): 223-227.

Ni(OH)_2水热氢还原制备超细Ni粉

中国科学院化工冶金研究所

基金项目: 国家８６３计划资助

关键词：纳米Ni粉 , Ni(OH)_2 , hydrothermal reduction

THE PREPARATION OF ULTRAFINE Ni POWDER FROM Ni(OH)_2 SLURRY BY HYDROTHERMAL REDUCTION WITH HYDROGEN

YU Kening , HU Siqiang , MAO Minghua , LIANG HuanzhenTAO Changyuan , KANG Ying , YIN Shu(Institute of Chemical Metallurgy , Chinese Academy of Sciences)

Keywords： : ultrafine Ni powder , Ni(OH)_2 , 水热还原

采用NiSO4加过量碱制取的Ni(OH)2水浆(pH12-13),经氢还原～30min制得平均粒度20nm以下的Ni粉.碱是否过量对Ni粉粒度影响较大;催化剂和温度对反应速度也有较大影响,氢还原反应机制不是液相中的Ni离子还原,而是Ni(OH)2固体微粒与活性氢之间的反应.

The ultrafine Ni powders with an average particle size of less than 20 nm can be prepared by hydrothermal reduction with hydrogen from the Ni(OH)2 slurry which was obtained by mixing the solutions of NiSO4 6H2O with NaOH. The NaOH amount was so adjusted t

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